NAME¶

SoIndexedNurbsCurve — indexed NURBS curve shape node

INHERITS FROM¶

SoBase > SoFieldContainer > SoNode > SoShape > SoIndexedNurbsCurve

SYNOPSIS¶

#include <Inventor/nodes/SoIndexedNurbsCurve.h>
Fields from class SoIndexedNurbsCurve:

SoSFInt32 numControlPoints
SoMFInt32 coordIndex
SoMFFloat knotVector
Methods from class SoIndexedNurbsCurve:

SoIndexedNurbsCurve()
static SoType getClassTypeId()
Methods from class SoNode:

void setOverride(SbBool state)
SbBool isOverride() const
SoNode * copy(SbBool copyConnections = FALSE) const
virtual SbBool affectsState() const
static SoNode * getByName(const SbName &name)
static int getByName(const SbName &name, SoNodeList &list)
Methods from class SoFieldContainer:

void setToDefaults()
SbBool hasDefaultValues() const
SbBool fieldsAreEqual(const SoFieldContainer *fc) const
void copyFieldValues(const SoFieldContainer *fc, SbBool copyConnections = FALSE)
SbBool set(const char *fieldDataString)
void get(SbString &fieldDataString)
virtual int getFields(SoFieldList &resultList) const
virtual SoField * getField(const SbName &fieldName) const
SbBool getFieldName(const SoField *field, SbName &fieldName) const
SbBool isNotifyEnabled() const
SbBool enableNotify(SbBool flag)
Methods from class SoBase:

void ref()
void unref() const
void unrefNoDelete() const
void touch()
virtual SoType getTypeId() const
SbBool isOfType(SoType type) const
virtual void setName(const SbName &name)
virtual SbName getName() const

DESCRIPTION¶

This class represents a NURBS curve based on the knot vector and the control points that you specify. The knotVector field specifies a floating-point array of values; the values are the coordinates of the knot points in the curve, and you must enter them in non-decreasing order. The numControlPoints field specifies the number of control points the curve will have and will use the current coordinates that are indexed from the coordIndex field. You can get a curve of minimum order (2) by specifying two more knots than control points and having at least two control points. This curve would be a set of line segments connecting the control points together. You can get a curve of maximum order (8) by specifying 8 more knots than control points and having at least 8 control points. In this curve, each control point would have influence on a larger portion of the curve than with curves of lesser order. The control points of the curve are transformed by the current transformation matrix. The curve is drawn with the current lighting model and drawing style (drawing style FILLED is treated as LINES). The coordinates, normals, and texture coordinates of a NURBS curve are generated, so you cannot bind explicit normals or texture coordinates to a NURBS curve. The approximation of the curve by line segments is affected by the current complexity value.

FIELDS¶

SoSFInt32 numControlPoints
Number of control points for the curve.

SoMFInt32 coordIndex
Coordinate indices for the control points.

SoMFFloat knotVector
The knot vector for the curve. Values must be in non-decreasing order.

METHODS¶

SoIndexedNurbsCurve()
Creates an indexed NURBS curve node with default settings.

static SoType getClassTypeId()
Returns type identifier for this class.

ACTION BEHAVIOR¶

SoGLRenderAction
Draws the curve based on the current coordinates, material, and so on.
SoRayPickAction
Picks the curve based on the current coordinates and transformation.
SoGetBoundingBoxAction
Computes the bounding box that encloses all control points of the curve with the current transformation applied to them. Sets the center to the average of the control points.
SoCallbackAction
If any line segment callbacks are registered with the action, they will be invoked for each successive segment approximating the curve.

FILE FORMAT/DEFAULTS¶

IndexedNurbsCurve {


numControlPoints	0
coordIndex	0
knotVector	0


}

SEE ALSO¶

SoNurbsCurve, SoIndexedNurbsSurface